High-pressure grouting end anchor type self-drilling pre-stressed anchor rod and construction method thereof

The invention discloses a high-pressure grouting end anchoring type self-drilling pre-stressed anchor rod which comprises a drill bit, an anchoring material, a hollow rod body, a grouting controller and a grouting mixer, the drill bit is connected to the end of an anchoring section of the hollow rod body, the grouting controller is installed on the hollow rod body, the two ends of the grouting controller are connected with the hollow rod body, and the grouting mixer is installed on the hollow rod body. The grouting mixer is communicated with the end of the free end of the hollow rod body, a grouting channel is formed in the hollow rod body, and the anchoring material is evenly stirred in the grouting mixer and injected through the grouting channel of the hollow rod body. The high-pressure grouting end-anchored self-drilling pre-stressed anchor rod is high in anchoring force and good in timeliness, and the grouting controller is arranged to ensure that an anchoring material is densely grouted ...